Revert "pinctrl: tegra: Add support to display pin function"

This reverts commit d1cd5b51bc9152dc2b63c5f843590272d6694d50.

It was reported that some I2C3 functions stop working after this
patch, and it is just debug help so let's revert it and investigate.

Link: https://lore.kernel.org/linux-gpio/20230925183049.10a40546@booty/
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/tegra/pinctrl-tegra.c

···
 	{"nvidia,slew-rate-falling",	TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
 	{"nvidia,slew-rate-rising",	TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
 	{"nvidia,drive-type",		TEGRA_PINCONF_PARAM_DRIVE_TYPE},
-	{"nvidia,function",		TEGRA_PINCONF_PARAM_FUNCTION},
 };
 
 static int tegra_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
···
 		*bit = g->drvtype_bit;
 		*width = 2;
 		break;
-	case TEGRA_PINCONF_PARAM_FUNCTION:
-		*bank = g->mux_bank;
-		*reg = g->mux_reg;
-		*bit = g->mux_bit;
-		*width = 2;
-		break;
 	default:
 		dev_err(pmx->dev, "Invalid config param %04x\n", param);
 		return -ENOTSUPP;
···
 		val >>= bit;
 		val &= (1 << width) - 1;
 
-		if (cfg_params[i].param == TEGRA_PINCONF_PARAM_FUNCTION) {
-			u8 idx = pmx->soc->groups[group].funcs[val];
-
-			seq_printf(s, "\n\t%s=%s",
-				   strip_prefix(cfg_params[i].property),
-					 pmx->functions[idx].name);
-		} else {
-			seq_printf(s, "\n\t%s=%u",
-				   strip_prefix(cfg_params[i].property), val);
-		}
+		seq_printf(s, "\n\t%s=%u",
+			   strip_prefix(cfg_params[i].property), val);
 	}
 }
 

drivers/pinctrl/tegra/pinctrl-tegra.h

···
 	TEGRA_PINCONF_PARAM_SLEW_RATE_RISING,
 	/* argument: Integer, range is HW-dependant */
 	TEGRA_PINCONF_PARAM_DRIVE_TYPE,
-	/* argument: pinmux settings */
-	TEGRA_PINCONF_PARAM_FUNCTION,
 };
 
 enum tegra_pinconf_pull {